Questions Asked on
November 30, 2016

Chemistry
Answer the questions about the following reaction. 4Al(s) + 3O2(g) 2Al2O3 (s) How many molecules of O2 are used in the reaction? How many oxygen atoms are required? How many moles of Al2O3 are formed? What is the mole ratio of Al to O2?
asked by RavenSierra 
Language Arts
1. What is the key to an effective search for information as you prepare for your presentation? (1 point) A. Prewriting B. Strong research skills C. Paraphrasing D. Drawing conclusions 2. Why would a website that is selling a service not be a credible
asked by Mathew 
physics
the speed of the train increased from 15 mi/hr to 25 mi/hr in distance of 500 ft. calculate the average acceleration in ft/s^2
asked by Anonymous 
cal
the height of a rectangular box is 10 in. Its length increases at the rate of 2 in/sec.;its width decreases at the rate of 4 in/sec. When the length is 8 in and the width is 6 in, the volume of the box is changing in cubic inches per second at the rate of
asked by lis 
math
Town P is on bearing 315 degree from town Q. While town R is south of town P and west of town Q. If town R is 60km away from Q, how fara is R from P?
asked by Anonymous 
Algebra
The equation h= 16t^2 + 32t + 9 gives the height of a ball, h, in feet above the ground,at t seconds after the ball is thrown upward.How many seconds after the ball is thrown will it reach its maximum height? What is its maximum height?
asked by Anonymous 
Science
which of the following statements is true as the moon goes from new moon to full moon phase? (2 points) A:We see more of the lighted side of the moon B:We see less of the lighted side of the moon C:The time it takes to go from new moon to full moon is 2
asked by Kali 
Calculus 1
If each edge of a cube is increasing at the constant rate of 4 cm/s. How fast is the volume of the cube increasing when the length x of an edge is 11 cm long?
asked by Dhrupal patel 
calc
When the height of a cylinder is 12 cm and the radius is 4 cm, the circumference of the cylinder is increasing at a rate of pie/4 cm/m in, and the height of the cylinder is increasing four times faster than the radius. How fast is the volume of the
asked by marrisa smith 
Maths
the points A,B,C and D lie on a straight line. The ratio of the length of AB to the length of BC is 3:4 and the ratio of the length of AC to the length of CD is 2:1. Find the ratio of the length of BC to the length of AD ?
asked by Tarun 
Science
It takes a force of 22 N to push a 10 kg box horizontally with a constant velocity over concrete. What is the coefficient of kinetic friction between the box and the concrete? My guess is 10 kg/22 N = 0.4545 but I'm not sure if you have to take in account
asked by Fred 
math
The gradient of one of the line of ax2+2hxy+by2=0 is twice that of the other,show that 8h2=9ab
asked by Sajjad 
Algebra 1 B
2. How is the graph of y = 6x^2 + 4 different from the graph y = 6x^2? A. It is shifted 4 units to the left. B. It is shifted 4 unites to the right C. It is shifted 4 units up. *** D.It is shifted 4 units down. 3. A model rocket is launched into a large
asked by Abigail 
Calculus
If f(x) is differentiable for the closed interval [−1, 4] such that f(−1) = −3 and f(4) = 12, then there exists a value c, −1< c < 4 such that a)f'(c)=3 b)f'(c)=0 C)f(c)=15 d)f(c)=3 I understand that you are supposed to use the mean value theorem,
asked by Miguel 
Statistics
The mean height of a certain kind of plant is 185 centimeters. Suppose we want to carry out a hypothesis test to see if the mean height when these plants are treated with a certain chemical differs from 185. State the null hypothesis H0 and the alternative
asked by Jimmy 
social studies  WW1
in 1914, which neutral nations joined allies later? Also, which neutral nations joined central powers later? Why would Germany worry about the alliance between France and Russia? Based on the map, which alliance had a greater advantage in 1914? Explain
asked by Jaime 
6th grade math
stephanie ran 1 lap in 6 minutes. At this rate how far would she run in 30 minutes?
asked by Kaye 
English
Which of the following is a true statement about an MLA Works Cited page? A. The Works Cited page requires no special formatting. B. The Works Cited page should immediately follow the conclusion and be on the same page. C. The Works Cited page should
asked by anonymous 
Social studies
which of the following is not an element of culture? A. language B. customs C. age** D. dress
asked by Cyborg_DRAGon 
Math
B) Noralie used 22 Gallons of Gas to go 682 miles. 1)What are the two unit rates that she might compute? 2)Compute each unit rate and tell what it means. 3) Which way is the most useful? Why?
asked by Siren 
Math Check
Which nonterminating decimal can be converted into a rational number? 0.818118111... 0.020304050... 0.010110111... 0.321321321... *** George has a square sandbox in the backyard. The sandbox has an area of 160 square feet. To the nearest foot, what is the
asked by Kimberly 
cal
if f(x)= 4x^321x^2+36x4, then the graph of f is decreasing and concave up on the interval(?,?)
asked by lis 
world geography
The results of the Cold War included all of the following except_
asked by Anonymous 
math algebra
the product of two consecutive even numbers is 440. What is the sum of the numbers?
asked by laura 
Physics
a 60kg ice skater holds up a large sheet of cardboard that can catch the wind and drive her (frictionlessly) across the ice. while she's moving at 0.5m/s, a wind that is constant and horizontal for 5.0s exerts a forward force on the cardboard of 2.0 n.
asked by Jocelyne 
physics
A 4.0 kg, 36cmdiameter metal disk, initially at rest, can rotate on an axle along its axis. A steady 5.5 N tangential force is applied to the edge of the disk. What is the disk's angular velocity, in rpm, 4.0 s later?
asked by Nathan 
Physics
Light of wavelength 469 nm passes through a slit, creating a diffraction pattern on a screen. The angular separation between the first diffraction minima on either side of the central maximum is 6.0∘ . Determine the width of the slit. I used this
asked by Po 
Algebra
Suppose a parabola has an axis of symmetry at x = 2, a minimum height at 6, and passes through the point (0, 10). Write the equation of the parabola in vertex form.
asked by Anonymous 
additional mathematics
if the 2nd term and the 4th term of an arithmetic progression are 15 and 23 respectively, find the first term and the common difference
asked by yoyo 
English
Which of the following is a true statement about an MLA Works Cited page? A. The Works Cited page requires no special formatting. B. The Works Cited page should immediately follow the conclusion and be on the same page. C. The Works Cited page should
asked by brooke 
Algebra 2
Complex numbers are written in the form a + bi. What does i represent? 1 0 1 sqrt1 **my choice
asked by JJ 
physic
what form of energy can be coverted from sound to light?
asked by KO 
math
If you wanted to reduce the 8 by 6 rectangle by a ratio of 1/4, what would the dimensions of the new rectangle be?
asked by Diego 
History
7. Which philosophy did Tang rulers apply to govern their empire? A. Buddhism B. Confucianism C. Daoism D. Hinduism I think the answer is D. but Im not sure.
asked by Alana 
Algebra
Find the sum: 8 over sigma symbol, k=1 below the symbol and (1)^k+1,5k to the right of it. Sorry the format is off, but I didnt know how else to type it in. Thank you.
asked by Alisha 
Math
A fish bowl is constructed out of a spherical bowl with diameter 20cm. The bowl was initially empty and water flows into the bowl at a rate of 10cm^3/s. Let V and h be the volume and depth of water in the bowl at time t seconds respectively. Find dh/dt
asked by Isabel 
History
Many people believe that the Civil War is considered to be the worst war in American history. What is the basis for this belief and do you agree or disagree with this statement?
asked by Autumn 
VU
A man spends 2/7 of his income on food and 3/7on clothing. If he still saves Rs. 500, what is his total income?
asked by sabir 
Math
I am an odd number I am less than 100 The sum of my digits is 12 What am I
asked by Anonymous 
Riyadh
A banner needs to be enlarged from its original format. The dimensions of the original are 4 cm tall by 25cm wide. The enlarged banner needs to be at least 8 m wide but no more than 1.4 m tall. Calculate the minimum and maximum ratios of enlargement
asked by Akabr 
science
A ray of light travelling in air strike the water surface at an angle of 40° calculate the refractive index of water if angle of refraction is 29°
asked by Shivani singh 
consumers math
Sam Sounds received a $290 discount loan to purchase a stereo. The loan was offered at 16% for 90 days. Find the interest in dollars and the proceeds for the following problem.
asked by Anonymous 
Math
Laura bought 24 pounds of sugar for $10. How many dollars did she pay per pound of sugar? If necessary, round your answers to the nearest hundredth. >> I got the answer 0.41 or 2.4. It says it is wrong.
asked by Piper 
Algebra
A physics student stands at the top of a hill that has an elevation of 37 meters. He throws a rock and it goes up into the air and then falls back past him and lands on the ground below. The path of the rock can be modeled by the equation y = 0.02x^2 +
asked by Mathew 
Physics
A container is filled to a depth of 20cm with water. on top of the water floats a 30.0 cm thick layer of oil with specific gravity of 0.700, what is the absolute pressure at the bottom? Please help!
asked by Anonymous 
Chemistry
A 26.3 gram sample of solid potassium chlorate decomposed and produced 9.45 grams of oxygen gas. What is the percent yield of oxygen?
asked by Anonymous 
Chemistry 1
What theoretical mass of MgO is produced if 0.150 g Mg3N2 is produced by strongly heating a 2.000 g sample of Mg in air?
asked by Jay 
Chemistry
one mole of ethanol releases 326.7 calories of energy during combustion. how many calories kilojoules are released? thank you ! :)
asked by Kenlen Smith 
math
the 54th term and 4th term of an A.P are 61 and 64 respectively.Find the common difference and 23rd tem
asked by Ana 
Math
Angela is twice as old as clara. Seven years ago, the sum of their ages was 16. How old is clara now?
asked by Janna 
Math
1.The difference of a number and sixteen A.n + 16 B.n  16 C.16n*** D.n/16
asked by Sid.V 
math
I have ten,ones and tenths.My digits are next door numbers and they add up to 9. What number am I?
asked by Owen 
Math
carlos can throw a ball 14 yards . His friend raul can throw 3/7 of that distance. Is rauls throw longer or shorter than 14 yards? Now find the exact length of Raul's throw.
asked by May 
english
It's permissible to delete a word or phrase from a direct quotation as long as you don't change the meaning of the quote. To indicate your deletion in the quote, you would A. use a hyphen in place of the deleted word or passage. B. use an ellipsis to
asked by english 
Math
The sequence a(1), a(2), a(3),...,a(n1), a(n) is such that a(r)= 7r3. Show that 1/[√a(r)  √a(r+1)] = k[√(7r3)  √(7r+4)]. The numbers/letters in brackets are subscript.
asked by Jade 
precalculus
please check my answers 1.Use Gaussian elimination to write the system of equations given below in rowechelon form. 2x+4y+z=4 2x4y+6z=13 4x2y+z=6 answer:2x+4y+z=4 8y5z=17 z=1 2.Find the solution to the system of equations given below. x+y+z=2
asked by Anonymous 
Physics
A 50kg ice skater moves around a bend at 8 m/s. The radius of the bend is 8 m. Centripetal force is provided by friction between the blade of the skates and the ice. What is the amount of centripetal force?
asked by Nolan 
science
The apparent weight of cube in liquid with relatibe density 0.9
asked by rajat 
Calculus
For which pair of functions f(x) and g(x) below will the lim(x>infinity) f(x)g(x)≠0 a)f(x) = 10x + e^x; g(x) = (1/5x) b)f(x) = x^2; g(x) = e^4x c)f(x) = (Lnx)^3; g(x) = 1/x d)f(x) = √x; g(x) = e^x
asked by anon 
Calculus
Consider the function f(x) = {0, x = 0 and 1  x, 0
asked by Anonymous 
Math
In a circus a tightrope is stretched from the top of a 10 ft. pole to the top of a 25 ft pole. The poles are 36 feet apart and vertical. How long is the tightrope? Show your work.
asked by Amy 
Science
Sperm and eggs are found in different parts of plant. Explain why it is important for these cells to unite and describe some factors in a environment that help unite them?
asked by regina 
Chemistry
Ch3ch2c'ch3,ch2'ch3ch2ch3
asked by Ashraf 
Chemistry
Calculate the equilibrium constant 2SO2(g]+O2(g]⇌2SO3(g] given equilibrium constant of SO2,O2,SO3 are 0.3m,0.14,1.45 respectively wt happens to the equilibrium constant a) if so2 is added b)if o2 is removed
asked by MANASA 
Math
A rectangular playground has an area of 2,996 square yards.if the width of the rectangle is 28,what is the length? Part#1 What is the area of the rectangle in square feet? Part#2
asked by Heaven 
maths
2 . Put the following macroeconomic model into matrix format using Y, C and T as the variables and find the determinant of the matrix of coefficients. There is no need to solve the equations. Y = C + I C = a + b (Y – T) T = tY Kindly help me with
asked by Asfand 
Math
2tan^1(tanx/2×tan(π/4y/2))=tan^1(sinx×siny/cosx+cosy)
asked by Mansi 
Math
Find the integral ∫(x^26x+1)/(x^2+1) dx
asked by Emily 
computer programming
Write a c++ code to vertically mirror an image.
asked by Anonymous 
Math
What does it mean for an equation to be balanced and why must you keep an equation in balance? Can someone explain in there own words please
asked by Sid.V 
Physics
During an adiabatic process, the temperature of 6.50 moles of a monatomic ideal gas drops from 525 °C to 169 °C. What is the work done? Here is my work, is it correct? T1 = 525+273 = 798 K T2 = 169 + 273 = 442 K work done = R[T2T1]/1gamma = 8.314[525 
asked by Kayla 
chemistry
In an adiabatic coffee cup, a 75mL of 1.0M HCl and 50mL of 1.0M HaOH were neutralize. The initial temperature is 22.1 C and the final temperature is 26.3 C. What is the enthalpy? S=4.18g/JC and the heat capacity of the adiabatic coffee
asked by KO 
chemistry
9.25% KCl solution is prepared by dissolving enough of the salt to give 100.0 g of solution. What is the mass of water required?
asked by carol 
value
A Biased Coin Is Such That The Head Is 4 Times More Likely To Show Up Than The Tail.What Is The Probability Of Obtaining A Head?
asked by Jonathan 
Math
Julio walks 3 1/2 miles in 1 1/4 hours
asked by Nicole Houston 
English
Ok so for my class I have to write about an issue that is found in multiculture literature. I can't think of any ideas of an issue that is important to me that i would like to write about.
asked by Melissa Bell 
Calculus MATH
Problem statement a) Suppose f(x) is defined on 0 ≤ x ≤ 1 by the following rule: f(x) is the first digit in the decimal expansion for x. For example, f(1/2) = 5 and f(0.719) = 7. Sketch the graph of y = f(x) on the unit interval with appropriate scales
asked by JIN 
Physics
A ship is heading north at 15km/h in a tide moving at 6km/h westward. Determine the magnitude and direction of the resultant velocity of the ship.
asked by Zablanity 
science
I'm stuck on the following questions 1)The geocentric model of the universe states that the Earth is the center of the universe. This is an example of a A)scientific conclusion B)pseudoscience C)scientific law*** D)Scientific method Through process of
asked by katrina 
college
Provide a numerical example to illustrate the effect of double entry book keeping on transaction.
asked by shima 
Math
I am anumber greter than 10 but smaller than 40.I am a factor of 56 but not amultiple of 4
asked by Marykaileen Constancio 
science
most of the life of a cell is spent in a period of growth and development called_____.
asked by audrey 
physics
A ship us heading north at 15 km/h in a tide moving at 6 km/h west ward. Determine the magnitude and direction of the resultant velocity of the ship.
asked by Angelika 
cal
find dy/dx implicitly, given x^3+y^3=3xy
asked by lis 
Math
When a number is a multiple of 6,what are the possible values for the ones digit?
asked by Bryce 
math
Zach is planning to invest up to $50,000 in corporate and municipal bonds. The lest he will invest in corporate bonds is $6000 and he does not want to invest more than $27,000 in corporate bonds. He also does not want to invest more than $34,650 in
asked by random 
math
Mileys music has a sale on music cds. All music Cds are discounTed 15%. mariana's receipt indicates that she saved $3 on her cd purchase. What is the full price of her music cd before discount
asked by Taylor 
social studies
what was the effect of the Khmer farmers'surplus? 1) they bought more slaves 2) they earned great wealth 3) they enjoyed rainwater all the time 4) they explored the Pacific Ocean #2 ?
asked by Evelyn 
Algebra
A grocery store makes a 20pound mixture of almonds and cashew nuts. The store charges $4 per pound for almonds and $5.50 per pound for cashews. The total value of the mixture is $92. Write a system to find how many pounds of each type of nut are in the
asked by Nola 
PreCalculus
Which is the best example of the use of parametric equations? A. Measuring weight on the moon. B. Finding the position of a person in a city. C. Determining the position of a satellite during a specific time of day. D. Finding the right parameters to use
asked by Iris 
Calculus 1
Water is flowing into a vertical cylindrical tank of diameter 4 m at the rate of 2 m3/min. Find the rate at which the depth of the water is rising. (Round your answer to three decimal places.)
asked by Dhrupal patel 
Accounting
Herring Wholesale Company has a defined benefit pension plan. On January 1, 2016, the following pension related data were available: ($ in 000s) Net gain–AOCI $ 350 Accumulated benefit obligation 3,170 Projected benefit obligation 3,200 Fair value of
asked by Ben 
social studies
What contributed to the growth of Japan's economy following WW2? 1)a decrease of exported goods 2) new factories with modern technology 3) a poorly educated workforce 4) fewer loans being given to businesses
asked by Evelyn 
cal
find the equation for the tangent line g(x)=x1/2x+4 at x=1
asked by lis 
Algebra 1
3x + y = 11 6x  2y = 2
asked by Anonymous 
Calculus
Find all values of c that satisfy the Mean Value Theorem for f(x) = x^3 + 1 on [2, 4].
asked by Anonymous 
English
I taught (thinking to myself not sure if it’s the right word taught) to myself that I needed to be fluent in programming languages to set myself apart from others in the job market and increase my quantitative skills. Is the proper word "taught" used
asked by Curious 
Math  Aglebra One (Ratios)
my grandfather has a huge coin collection of silver dollars and 50cent pieces. He promised to give one fourth if his collection to the first of his grandchildren who can figure put the total value of his coins. The only cares he will give are these: There
asked by Christine 
CHEM 1301
A sample of propane, C3H8, contains 12.2 moles of carbon atoms. How many total moles of atoms does the sample contain?
asked by A 
social studies
how would the Philippine government respond to an insurgency? 1) government would try to work with their members 2) government would support it 3) government would ignore it 4) government would fight it fiercely
asked by Evelyn 
math
ratio 1/3
asked by karla 
Algebra
A gardener is making a planting in the shape of a trapezoid. It will have 41 plants in the front row, 37 in the second row, 33 in the third row, and so on. If the pattern is consistent, how many plants will there be in the last row? How many
asked by Alisha 
PreCalculus
Which are examples of the use of parametric equations? A. Position of a person on a ferris wheel. B. Position of a ball after being thrown. C. A and B D. Neither A nor B
asked by Iris 
social studies
How does the climate of Southeast Asia vary among regions? 1) mainland is much hotter that the islands 2) mainland receives monsoons but islands do not 3) islands are generally wetter than the mainland 4) islands have a subtropical climate but the mainland
asked by Jaden 
cal
Monthly sales, in thousands, of a new laptop computer grow according to the model N(t)=4.7te^0.3t where t is the number after introduction. Determine the point of diminishing returns and interpret your answer.
asked by lis 
English
has anyone read the short story "the new veterans" and can give me like a summary of what happened in the story? i already tried looking online but couldn't find a complete summary? i just need to know mainly the plot? it would be much help
asked by Kayla 
Algebra
The length of a rectangle is 2 ft less than three times the width. The area is 60 ft SQUARED. Find the length of the rectangle
asked by Anonymous 
Math
Expand (3+i)^5, where i^2=1 (3+i)^5=? Please and thanks.
asked by Philip 
Physics
An object is 3 cm tall is placed 24 cm from a converging lens.a real image is formed 8 cm from the lens.the focal length of the lens is
asked by Swaleh 
math
Kofi and Ama both receive 50,000 dollars annually in the companies they work for. In Kofi's company, the mean annual salary of 60,000 dollars with a standard deviation of 5,000 dollars. Ama's company on the other hand has a mean annual salary of 35,000
asked by Kofi1 
physics
A ball is rolled off a table that is 1.25 meters tall and lands on the ground 0.48 meters away. If it took 0.505 seconds for the ball to land, what was the horizontal velocity of the ball? Record your answer to the nearest hundreth m/s (You do not need
asked by katy 
Chemistry
Arrange the following from LOWEST to HIGHEST number of particles per L of solution: .1m Na3PO4 .1m C2H5OH .01m CO2 .15m NaCL .2m CaCl2
asked by BCarie 
physics
An object is projected at an angle of elevation of 45 degree with a velocity of 100m/s. Calculate it's range
asked by anees 
Math
If i rent a boat for 3.5 hours and the cost for 3 hours is 41 dollars and i split the cost with my friend how much will each person pay for the cost
asked by Jlast 
Algebra
(3x2)(3x+)(x4)square.
asked by Komal yaseen 
MATH
3xyysquare=2 and 2x 3y=4
asked by LEKAN 
Math 6A unit test
What is the value of the blank in this question? 6/5 divided by ______ = 6
asked by Abby 
pre calculus
can you check this question? An object moving vertically is at the given heights at the specified times. Find the position equation s = at^2 + v0t + s0 for the object given the following conditions. •At t = 1 seconds, s = 48 feet •At t = 2 seconds, s =
asked by Anonymous 
precalculus
Can you check my answer? If it is wrong can you please explain why and give the correct answer? Use Gaussian elimination to write the system of equations given below in rowechelon form. 2x+4y+z=4 2x4y+6z=13 4x2y+z=6 answer:2x+4y+z=4 8y5z=17 z=1
asked by Anonymous 
7th grade math
Allison earns a $40,000 base salary plus a commission equal to 15% of her total sales. What expression represents what she earns in total? I think it is : 40,000 + 0.15s thank you
asked by please check my work 
Math
Let y=e^(cos^1x) for modx
asked by Joel 
Math
How do you find the missing number? 4/5 > 2/x
asked by Me 
Math (Geometry)
Linerar Equations Hourly rate of $8.00 an hour for a guaranteed 40 hours
asked by Frank 
Math
Two consecutive angles of a parallelogram measures (X+35) and (5X21) respectively determine the measures of each angle in the parallelogram.
asked by Camille 
physics
2. A wooden block slides directly down an inclined plane, at a constant velocity of 6 m/s. a. How large is the coefficient of kinetic friction if the plane makes an angle of 25º with the horizontal? 0.466 b. If the angle of incline is changed to 10º, how
asked by abby 
7th grade math
Lightning electronics charges $9.98 plus 0.75 per pound to ship electronic purchases. Write and solve an equation to find the weight in pounds of a dvd player for which the shipping charge is $18.23. I thin k it is 9.98 +.75p = 18.23 the answer being
asked by one more please check my work 
Physics
Any help is appreciated! A grandfather clock is based on the period of oscillation of a pendulum. The clock keeps perfect time on the first floor of the Sears tower but when carefully moved to the top floor h=436 m above the surface of the earth, the clock
asked by Jamie 
Physics Fluids
Please help! Any advice is appreciated A water faucet in a house is h=8 m below the water surface in the local water tower. The radius of the orifice in the fully opened faucet is r=0.01 m. We assume nonviscous flow in this problem. a) How long does it
asked by Jamie 
Math
A car travels 540 hours om 45L. of gasoline.How far can it travels on 60L. of gasoline?
asked by John mark 
english
we did not grow rice voice
asked by mukesh 
math
the position of a car in time t (in hours) is (10+45t,40+70t) and a truck (4040t,20+75t) find the distance between the car and the truck at time t=0 in km) i have 53.9km to 1dp find an expression for d^2 in terms of t) I have 7250t^2 8700t+290 Complete
asked by s17 
Math
You want to buy three books that are on sale at 20% off. The original prices of the books are $2.50, $4.95, and $6.00. How much will you save?
asked by Lucy 
Science chemistry
Determine the number of moles of oxygen in 1 mol of dinitrogen tetraoxide N2O4= N 2×14.01g/mol= 28.02g/mol O 4×16.00g/mol= 64.00g/mol N2O4= 92.02g/mol I can't get the right formula to solve the rest. Please help and thank you
asked by Farhin 
michelle
An object moving vertically is at the given heights at the specified times. Find the position equation s = at2 + v0t + s0 for the object given the following conditions. • At t = 1 seconds, s = 48 feet • At t = 2 seconds, s = 64 feet • At t = 3
asked by Anonymous 
precalculus
Write the form of the partial fraction decomposition of the rational expression. 1/9x^24
asked by Anonymous 
pre calculus
Use Gaussian elimination to write the system of equations given below in rowechelon form. 2x+4y+z=4 2x4y+6z=13 4x2y+z=6
asked by Anonymous 
chem
A sample of oxygen at 32◦C occupies 340 mL. If this sample later occupies 1064 mL at 57◦C and 1.2 atm, what was its original pressure?
asked by lex 
Algebra
Two number cubes have sides numbered 16. If both cubes are rolled at the same time, what is the probability that the numbers on both cubes will be greater than 3?
asked by Me 
Engineering science
A steel cylinder contains an ideal gas at 27°C. The gauge pressure is 140kPa. If the temperature of the container increases to 79°C, what is the new gauge pressure?
asked by Shah 
Physics
Gas is confined in a tank at a pressure of 11.0 atm and a temperature of 25.0 degrees C. If twothirds of the gas is withdrawn and the temperature is raised to 75.0 degrees C, what is the new pressure of the gas remaining in the tank? Please help!
asked by Anonymous 
physics
Suppose a river flows due south with a speed of 2.0 m/s. Given that speed of motorboat relative to water is 4.2 m/s due east. (a) In what direction should the motorboat head to reach a point on the opposite bank directly east from your starting point? (b)
asked by Sue 
Physics
Please help! Any advice is appreciated A water faucet in a house is h=8 m below the water surface in the local water tower. The radius of the orifice in the fully opened faucet is r=0.01 m. We assume nonviscous flow in this problem. a) How long does it
asked by Jamie 
Algebra
Bob is making sandwiches for a school picnic. He is making these types: ham, cheese, and turkey. So far, he has made 12 ham sandwiches, 20 turkey, and 4 cheese. What combination can he make so that exactly 1/5 of the sandwiches are cheese?
asked by Me 
Chemistry 1
Which shows equilibrium between solute and solvent? I'm stumped. a. 2 M CaCl2 b. 1 g Na2CO3 & 100 mL H2O c. 2 mL methanol & 4 mL hexane d. 1 mL H2O & 3 mL ethanol
asked by Anonymous 
math
Water weighs about 8 pounds per gallon
asked by brandon 
math
Joan babysits for 6 dollars per hour.
asked by brandon 
Math Calculus
Hi, I need help with the problem: "Use a definite integral to find the area of the region under the curve y=64x^2 and above the xaxis". I keep getting stuck at 6x(4x^3/3). Thanks!!
asked by Gabby 
Math
The sum of two numbers is 3.What is the maximum value of the product of the first and the square of the second?
asked by Bhim 
math
Find five rational numbers between  3/5 and  1/2
asked by vivek 
math
How much money will amount on ₹ 560 in 3 years at the rate 4% per annum
asked by ashutosh 
Math
Elena has 15 more dimes than nickels. If she has $2.55, how many nickels does she have?
asked by Sam 
physics
calculate the volume in cubic centimeters and area in square millimeters of a spherical bacterium of diameter 2.0um. model the bacteria is spheres
asked by Sue 
English
What are some personality and physical characteristics of coyotes?
asked by Boberto 
math
1/2 of a class play soccer, 1/4 of the team are girls, what fraction represents how many girls on the team
asked by Anonymous 
ss
opponents of the national bank relied on which idea to bolster their arguments? A. states' rights B. suffrage C. federalism D. expansionism i choose A, but i think i'm wrong
asked by ppap 
Math
How many bricks of size 20cm×10cm×5cm are required to Build the wall leaving 10%of the space for the cement work?
asked by Isha 
Algebra (Please Check My Answers)
CCA Unit 4 Lesson 11 3. If a number is not a rational number, then it is ______. ~ an integer ~ and irrational number*** ~ a whole number ~ a radical 4. James attached a diagonal brace across a rectangular frame that measures 6 feet by 8 feet. What is the
asked by A Girly Girl :) 
Integral Calculus
Volume of the area bounded by y=sin(x), xaxis, x is greater than or equal to 0 but less than or equal to pi, revolved about x=3pi/2.
asked by Alexa 
Math
1. Suppose y varies directly with x and, y=15 and x=5. Write a direct variation equation that relates x and y. What is the value of y when x=9? I need a little help on how to figure out how to write this out. Any help will be appreciated. Thank you
asked by Anonymous 
Physics
A ship is heading North at 15 km/h in a tide moving a 6 km/h westward. Determine the magnitude and direction of the resultant velocity of the ship.
asked by Charlotte 
Maths
The numerator of a fraction is 4 less than its denominator if the numerator is decreased by 7 the fraction becomes 2/3. Find the fraction?
asked by Rizwal 
Science chemistry please help
Determine the number of moles of oxygen in 1 mol of dinitrogen tetraoxide
asked by Farhin 
e
Find the area of a parallelogram with sides of length 6 and 8, and with an interior angle with measure $45^\circ$.
asked by Anonymous 
Math
Evaluate the expression when a = 6. a24 A.30*** B.18 C.18 D.22
asked by Sid.V 
Chemistry
calculate the volume needed to make 2.20 x 10^2 ml of 0.100M cacl2. what would be the total concentration of the final (Cl) alone?
asked by Lyn 
math
Complete the statement. Round to the nearest hundredth if necessary. 3 pt =？ c
asked by Howard Yao 
Math
In the triangle ABC, AC=2cm, AB=x cm and angle ABC=π/2 rad. 1. Given that angle BAC=ϴ rad, and that ϴ is a sufficiently small angle, show that x≈ a + bϴ^2, where a and b are constants to be determined. 2. For this part, ϴ is not assumed to be a
asked by John 
science
1.A scientific law A)can have only one known exception B)can have any number of exceptions as long as we know about them C)might have many exceptions we don’t know about D)has no exceptions*** 2.Sunspots are A) solar storms that can interfere with
asked by katrina 
geometry
what are the step to find the volume of an aquarium in cubic feet when its height is 25 1/2 inches and its radius 21 inches?
asked by jill 
Calculus
Which of the following functions does not satisfy the conditions of the Mean Value Theorem on the interval [1, 1]? a. 5th root of x b. 2x arccosx c. x/(x  3) d. sqrt(x + 1)
asked by Anonymous 
English
Prewriting can be helpful when trying to narrow a topic because it A. can reveal an interesting angle that may become your thesis. B. can usually be submitted as the final essay. C. helps you eliminate ideas that would support your thesis. D. raises a lot
asked by anonymous 
english
The final section of a research paper paragraph should include _______, to help readers figure out how the evidence supplied in the body of the paragraph supports the topic. A. an analysis B. a transition C. a citation D. a quotation C?
asked by caitlyn 
Calculus AB
Please help me with this WS 1) Find the value of lim as x>(square root of 3) of (x^4 + 5x^2 6)/(x+(square root of 3) 2) Find the distance between the discontinuities of g(x)= ((square root of x4))/(x^2 5x 1) 3)Find the value of x at which the curve
asked by Annie 
math
Find the initial amount given an exponential function. Given the equation y = 24(0.77)^t, what is the initial amount? To find the initial amount, I need to replace t with 0. When I do that, I get y = 24(0.77)^0 which is y = 24(1), so y = 24 In doing other
asked by Carly 
AP Bio
When purebreeding red cows are bred with pure breeding white cows, the offspring are roan. The roan cows also have a gene for horn vs. hornless cattle. The allele for horns dominates the allele for hornless. If a bull and cow are heterozygous for both
asked by Mike 
geometry
once you find the voume in cubic inches, how do you convert to cubic feet?
asked by jill 
Math
Find all solutions of the equation cot(theta)+1=0 through the interval [0,2pie).
asked by Anonymous 
science
Take 1mL of 1M NaCl solution, and add 9mL of water. Then take 10microL of the diluted solution and add 40microL of water. What is the dilution? And what is the final concentration of NaCl? So I see how this is a 2:1 dilution, but I am having a hard time
asked by Alli 
Gov. please help!!
I'm not getting what my teacher means by this question: What would constitute an ideal form of gov. in the U.S and how would this help to shape our country more in a positive light?
asked by D. 
Physics
Do you think that power generated by the electric company means the same thing as the power as explained in this lesson (meaning work over time)? Why or why not? My teacher gave a hint to "Think about each in terms of the amount of work done" Please help!
asked by Nathaly 
MATHS
PARTS OF A POLE WERE PAINTED RED,BLUE AND YELLOW.3/5 OF THE POLE WS RED AND 7/8 WAS BLUE.WHAT PART WAS PAINTED YELLOW?
asked by BERNARD 
history
Texas decreasing population in the late 1790s, gave the Spanish a reason to _____________
asked by alexia 
Physics
You set up a ramp with a length of 1.15 m, raising one end to a height of 0.4 m. You then roll a 0.300 kg toy car down the ramp, starting at rest a)What is the change in potential energy of the toy car rolling down this ramp? b)If all of that energy is
asked by A 
physics
A particle of mass 1kg moving with initial velocity (i+2k)m/s is acted upon by a constant force(i+2j2k)N,calculate the velocity and distance after 5s.
asked by kazeem abiodun sikiru 
math
i need help with a problem wanting me to explain the differences between silver and gold using the terms atom and elements
asked by Tyler 
art
Could you please check my answer please...thank you Which of the following is the best evaluation of the artwork based on the criterion that the piece feature imaginary creatures or things. 1. The artwork is successful because it features a fully clothed
asked by Justin 
English
If you had read The Last Judgement could you please help me? God...."The fifth and sixth people were an old married couple;he finished them off with an axe and found practically no money, although they had more than twent thousand hidden away." Kugler
asked by Anonymous 
Math
One half of a number plus three is eighteen. Find the number
asked by Anonymous 
Math
What is 105/2.1
asked by Jenny 
Math
Joshua went on shopping spree. He bought a backpack,7 notebooks,4 games and a clock. The backpack cost $16.00, the notebooks cost $9.40 each the games cost $15 each and the clock cost $24.00. How much money did he spend?
asked by Jenny 
Language Arts
Read the following lines from Sunjata. God is with the just. Everybody does what he wants, But God makes the final decision. The chick destined to be a rooster will eventually crow, No matter what is laid in its path. It will overcome. Which would BEST
asked by Anonymous 
physics
Suppose Captain Marvel leaps from the top of a 20 m tall building. If his initial speed is 12 m/s, then what is his speed just before he lands on the ground?
asked by Mary 
Chemistry
2SO2(g]+O2(g]⇌2SO3(g] ,4 conditions by which concentration of SO3 can be increased I need the answer for my exam i would be thankful if anyone answered it THANK YOU
asked by MANASA 
Math: Creating a linear equation
Alex has been offered $50 to accept the job, plus, $13 per hour. Alex claims he will complete the job in 7 hours. How would you write this as a linear equation in the form of: c = mt + b if c is the cost and t is the time, m is the slope, and b is the
asked by Avni Singh 
PreCalculus
Convert to rectangular: theta=2pi/3
asked by Iris 
Super Hard Math
What multiplication fact can be found by using the arrays 2 times 9 and 5 times 9
asked by Markeyvion 
Science
Derive an expression for kinetic energy of an object mass m moving with uniform velcoity v what happens to the kinetic energy of a body if its velcoity is halved?
asked by Danial 
Science, physics
A ship is heading north at 15km/h in a tide moving at 6km/h westward. Determine the magnitude and direction of the resultant velocity of the ship. I can't answer it because I don't get the formula. And please give me the formula. I need the answer later.
asked by Zablanity 
college algebra
James can detail a car by himself in 60 minutes. Manny does the same job in 55 minutes. How long will it take them to detail a car working together
asked by Amberlyn 
Science Physics
Derive an expression for kinetic energy of an object mass m moving with uniform velcoity v what happens to the kinetic energy of a body if its velcoity is halved
asked by Danial 
biology help
The features listed above describe what type of cell? Unicellular Has a cell wall May have flagella Single chromosome Ribosomes for protein synthesis
asked by angelina 
social studies
Who built the Great Wall of China? I think a Qin emperor
asked by Evelyn 
Physics
Derive an expression for kinetic energy of an object mass m moving with uniform velcoity v what happens to the kinetic energy of a body if its velcoity is halved?
asked by Danial 
College alegbra
A rancher wants to create a fence enclosing 1500 m2 of land. The plot will be divided into two equal areas by an additional fence parallel to two sides as shown in the diagram below. Find the dimensions of the plot which results in using the least amount
asked by Emily 
Math
My younger sister needs help with this problem: You have an 8 inch stack of dimes, each dimes is a half inch, how many dimes are there? I know the answer is 17, but I need to help her show her work
asked by Palmer 
Math
There are 12 more girls than boys in the class. 35 % of the class are boys. How many pupils are there in the class?
asked by Kay 
math ( plane)
find the equation of the plane passes through the middle point of the join of the points (2,3,1) and (4,5,3) and is perpendicular to the line joning the points?
asked by help 
Math
A customer's bill for maintenance and repair at a service station showed 6 quarts of oil at $1.15 each an air filter at $3.75 an oil filter at $7.45 13 gallons of gasoline at $1.15 a gallon and 3 hours labor at $37.00 an hour What was the total bill?
asked by Jenny 
Math
A car rental agency charges $44.12 per day plus mile for a certain type of car How much is the rental charge for a 3 days trip of 605 miles?
asked by Jenny 
math
the cost of banana is Re.1 more than that of an orange. Mr asad purchased 12 bananas and 20 oranges . if he paid Rs.108 to the fruit saller, find the price of a banana and orange.
asked by fazalamin 
Science
If you place a grape in a large amount of sugar water, what will happen to it and why?
asked by Owen 
order pair and relations
Henry is building a fence in his backyard for his new puppy. he has 36 feet of fencing and wants a fence in a rectangular area. what is one set of whole number dimension of the fenced in area?
asked by lois 
math
how many sets of 4 are there in sets of 24?
asked by justin 
English
Explain what the speaker's word choice shows us about puritans. " let us hope, to symbolize some sweet moral blossom that maybe found along the track, or relieve the darking close of a tale of human frailty and sorrow." From the scarlet letter chapter 1
asked by Emma 
Physics
A 4.05 x 102kg block is resting on a horizontal frictionless surface and is attached to a horizontal spring whose spring constant is 121 N/m. The block is shoved parallel to the spring axis and is given an initial speed of 8.65 m/s, while the spring is
asked by BrookeNeed 
Math
Ok so in class this is what our teacher had us do.... 1.Pick a number to represent the number of times you would like to have chocolate in a week (more than once, but less than 10 times). 2.Double this amount (just to be bold). 3.Add 5. 4.Multiply the
asked by Melissa 
Math: Creating a linear equation
Cooper claims he has already completed the job and is offered $141 as a one time payment. you have to write this as c = mt + b if c is the cost, m is the slope, t is the time(hours) and b is yintercept!!! PLEASE HELP!
asked by Summer Johnson 
Science physics
A ship is heading north at 15km/h in a tide moving at 6km/h westward. Determine the magnitude and direction of the resultant velocity of the ship.
asked by Anon 
math
what is square root of 54 x 3 x i.
asked by Boberto 
Science
The lung is to the respiratory system as the ____ is to the integumentary system. A) heart B) kidney C)hand D)brain B
asked by Hayden 
Math
0.23 decimal as a fraction.
asked by Mahlet 
precalculus
When using Gaussian elimination to solve a system of linear equations, explain how you can recognize that the system has no solution. Give an example that illustrates your answer.
asked by Anonymous 
Algebra
A taxi charges 1.80 per mile with an initial fee of 12.00 how far can you go with 50.00
asked by Madison 
Portions and integers
I need help please. Mercury is a metal that is liquid at room temperature. Its melting point of 39 degrees Celsius. The melting point of isopropyl alcohol is 89 Celsius. (Part A) In the context of this problem, what does zero mean ? (I think it just
asked by Jessica 
precalculus
When using Gaussian elimination to solve a system of linear equations, explain how you can recognize that the system has no solution.
asked by Anonymous 
English
1. The gate is shut at 7. 2. The gate gets shut at 7. 3. The gate grows shut at 7. 4. The gate becomes shut at 7. (Are they all the same in meaning?) 5. The gate is shut now. 6. The gate stands shut now. 7. The gate lies shut now. 8. The gate remains shut
asked by rfvv